package com.jianyushe.gulimail.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.jianyushe.gulimail.common.utils.PageUtils;
import com.jianyushe.gulimail.common.utils.Query;
import com.jianyushe.gulimail.product.dao.CategoryDao;
import com.jianyushe.gulimail.product.entity.CategoryEntity;
import com.jianyushe.gulimail.product.service.CategoryBrandRelationService;
import com.jianyushe.gulimail.product.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {
   @Autowired
    CategoryBrandRelationService categoryBrandRelationService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public  List<CategoryEntity> listWithTree() {
        // 查找所有分类
        List<CategoryEntity> categoryEntities = baseMapper.selectList(null);
        // 挑出一级分类
        return categoryEntities.stream().filter(categoryEntity ->
                categoryEntity.getParentCid() == 0
        ).map(categoryEntity -> {
            // 设置子菜单
            categoryEntity.setChildren(getChildren(categoryEntity, categoryEntities));
            return categoryEntity;
        }).sorted((menu1, menu2) -> {
            // 排序
            return (menu1.getSort() == null? 0 : menu1.getSort()) - (menu2.getSort() == null? 0 : menu2.getSort());
        }).collect(Collectors.toList());
    }

    @Override
    public void removeMenuByIds(List<Long> asList) {
        // TODO  检查当前删除是否被其它地方引用
        baseMapper.deleteBatchIds(asList);
    }

    // 获取子菜单
    private List<CategoryEntity> getChildren(CategoryEntity root, List<CategoryEntity> all) {
        return all.stream().filter(categoryEntity ->
                categoryEntity.getParentCid().equals(root.getCatId())
        ).map(categoryEntity -> {
                    // 递归找到子菜单  可能root的子菜单还有子菜单
                    categoryEntity.setChildren(getChildren(categoryEntity, all));
                    return categoryEntity;
                }
        ).sorted((menu1, menu2) -> {
            // 排序
            return (menu1.getSort() == null? 0 : menu1.getSort()) - (menu2.getSort() == null? 0 : menu2.getSort());
        }).collect(Collectors.toList());
    }

    //[2,25,225]
    @Override
    public Long[] findCatelogPath(Long catelogId) {
        List<Long> paths = new ArrayList<>();
        List<Long> parentPath = findParentPath(catelogId, paths);

        Collections.reverse(parentPath);


        return parentPath.toArray(new Long[parentPath.size()]);
    }

    /**
     * 级联更新所有关联的数据
     * @param category
     */
    @Transactional
    @Override
    public void updateCascade(CategoryEntity category) {
        this.updateById(category);
        categoryBrandRelationService.updateCategory(category.getCatId(), category.getName());
    }

    /* *//**
     * 级联更新所有关联的数据
     * @param
     *//*
    @Transactional
    @Override
    public void updateCascade(CategoryEntity category) {
        this.updateById(category);
        categoryBrandRelationService.updateCategory(category.getCatId(),category.getName());
    }*/

    //225,25,2
    private List<Long> findParentPath(Long catelogId,List<Long> paths){
        //1、收集当前节点id
        paths.add(catelogId);
        CategoryEntity byId = this.getById(catelogId);
        if(byId.getParentCid()!=0){
            findParentPath(byId.getParentCid(),paths);
        }
        return paths;

    }
}